Map‑Georeference Demo

Georeferencing is the step that turns a scanned map into a map a computer can place on Earth, and Evan Applegate posted a browser demo that does it with an interactive web map and language-model help. (docs.qgis.org) (github.com) Applegate, who uses the handle @youwillmakemaps, published the demo on X and has a GitHub account showing a `simple-georeferencer` repository created in March 2026. His GitHub profile also links that X handle to his cartography work. (x.com) (github.com) A notes page describing the tool says Simple Georeferencer runs in a browser, lets users add ground control points, offers multiple basemap and projection options, and exports GeoTIFF files. GeoTIFF is a standard image format that stores map coordinates inside the file, which is why QGIS and other Geographic Information System software can open it as spatial data. (spatialthoughts.github.io) (docs.qgis.org) Ground control points are the matching landmarks a user clicks on both the old map and the modern map: a church, a road junction, a shoreline bend. QGIS documentation describes the same basic method, using those matched points to transform an unreferenced image into a placed raster layer. (docs.qgis.org) (qgistutorials.com) The web side matters because Applegate’s demo uses MapLibre, an open-source mapping library for interactive maps in the browser. MapLibre’s documentation describes it as a toolkit for rendering styled, interactive maps across web and native apps. (maplibre.org) The historical-map angle matters because georeferencing is usually the slow part of comparing past and present landscapes. Allmaps, a separate web georeferencing project used by libraries and archives, makes the same pitch at larger scale: digitized maps become more useful once they are aligned to real coordinates. (allmaps.org) (mapping.share.library.harvard.edu) Applegate’s pitch is narrower than a full Geographic Information System workflow. The demo is presented as a practical portfolio piece that combines retrieval, user interface work, and modest machine-learning assistance rather than a replacement for professional desktop tools such as QGIS. (x.com) (github.com) That makes the export step the hinge: a browser demo is useful for fast setup, but a GeoTIFF lets the result move into standard mapping software for cleanup, analysis, or publication. In other words, the demo starts with a casual web interaction and ends with a file format GIS users already know. (spatialthoughts.github.io) (docs.qgis.org) For developers building map-heavy portfolios, Applegate’s post lands on a simple idea: show the map, show the code, and hand people a file they can open somewhere else. That is a cleaner test of usefulness than a static screenshot of an old map pinned to a webpage. (x.com) (github.com)